JPS5931935B2 - Manufacturing method of laminated decorative board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a laminated decorative board.

In order to give metallic luster to laminated decorative boards, conventionally, copper, brass, lead, and other types of shiny metal powders and mica powders are mixed into transparent paints and adhesives and applied to base materials such as plywood. things are being done.

However, since these powders lack hiding properties against the base material, uneven color on the surface of the base material appears on the surface of the laminated decorative board, making it impossible to unify the hue of the appearance. In this method, a filler is applied to the base material in advance, or a filler such as titanium is mixed into the paint or adhesive along with metal powder. However, there is a problem in that the number of steps increases when applying a filler, and when a filler such as titanium is mixed, although the hiding properties of the base material can be ensured, the metal powder is wrapped in the filler. The drawback was that sufficient gloss could not be obtained.

Therefore, an object of the present invention is to provide a method for manufacturing a laminate decorative board that can easily hide a base material, have a uniform hue, and have an excellent metallic luster. be.

That is, in this invention, a masking filler with a specific gravity of 3.5 or more, a glossy powder with a specific gravity of 3 or less, and a dispersant are mixed into a base material made of plywood, hardboard, chipboard, slate, etc. It is characterized by applying an adhesive to the upper surface of the base material and laminating a translucent sheet on the surface, and the filler with hiding properties is zinc white (specific gravity 5.4-5. 7), white lead (6.4-6.9), lithopone (4.2-4.3), zinc sulfide (4.0-4,
It is particularly desirable to use a white powder with excellent hiding properties, such as titanium oxide (3.7 to 3.9), and powders with a specific gravity of 5.0 or more, such as zinc white or lead white.

In addition, as the glossy powder, mica powder (specific gravity 2.0-3.
0), aluminum powder (2.7), etc., and the mixing ratio is 1 to 10% each of filler and gloss powder.
shall be. Furthermore, as a dispersant, sodium silicate,
Preferred examples include sodium phosphate, barium stearate, and calcium stearate. In addition, as the translucent sheet, it is desirable to use a pattern sheet in which a pattern is printed on a transparent or translucent sheet such as vinyl chloride, vinyl chloride acrylic, polyethylene, or polypropylene. The surface may be finished with a transparent resin paint made of acrylic, polyester, or the like.

As shown in the drawing, the thus obtained laminated decorative board has contaminants in the adhesive 2 applied to the base material 1 separated into two layers depending on the specific gravity, The lower layer is formed of an obscuring filler 3 with a high specific gravity, and the upper layer is covered with a glossy powder 4 with a low specific gravity, and a transparent sheet 6 having a printed pattern 5 laminated on the upper surface and a transparent sheet 6 are formed. The luster based on the glossy powder 4 appears on the surface through the surface resin paint 7, giving this laminated decorative board excellent shine, and moreover, it can hide the base material 1 well and have no uneven hue. It can be done.

It should be noted that the greater the difference in specific gravity between the filler 3 and the glossy powder 4, the better the degree of separation of the two layers, which improves the hiding power for the base material 1 and also blocks the gloss of the glossy powder 4. Therefore, zinc white, lead white, and other materials with a specific gravity of 5.0 or more are suitable. Further, if the mixing amount is less than 1%, no hiding effect will be obtained, and if it exceeds 10%, the gloss of the glossy powder 4 will be blocked and the adhesiveness of the adhesive 2 will be reduced. Furthermore, regarding the gloss powder 4, if the amount is less than 170, the gloss effect will be lost, and if it exceeds 10%, the adhesion of the adhesive will decrease, so it is best to set it to 3 to 5%. be.

Further, the dispersant is used to activate the surfaces of the filler 3 and the glossy powder 4 to easily disperse and separate them, and good results can be obtained by mixing the dispersant in an amount of 1 to 370.

As described above, the method for manufacturing a laminated decorative board of the present invention involves applying an adhesive containing a masking filler with a high specific gravity, a glossy powder with a low specific gravity, and a dispersant to the upper surface of the base material. Because it is applied to the top surface, it has the effect of unifying the hue and imparting excellent metallic luster in a single step without applying a filler to the base material.

Example 1: Zinc white with a specific gravity of 5.5, 3% of 5701 mica powder with a specific gravity of 2.7, and 3% of sodium silicate were mixed into an ethylene monoacetate vinyl adhesive that becomes transparent after heat curing. Then, coat this onto a 4w1t thick plywood using a roll coater.
After applying M2 and semi-drying, a 70μ thick vinyl chloride sheet with a teak pattern printed on it was pasted on top of it with the printed side facing out to obtain a laminated decorative board.
Its surface has a uniform hue and excellent shine.

Example 2: An adhesive mixture having the same composition as in Example 1 was applied to a particle board with a thickness of 9 mm at 110 f1/M2, and the surface was embossed with wood grain using an embossing roll, and then a rose pattern was printed on the thickness. When a laminate decorative board was obtained by pasting a transparent sheet of 50 μm vinyl acrylic, it had excellent uniformity of hue and brightness.

Example 3: An adhesive mixture with the same composition as in Example 1 was applied to a plywood board with a thickness of 4 cm (779/M2) and, after semi-drying, a sheet of semi-transparent tissue paper with a weight of 23 f1/M2 with a zelkova pattern printed thereon was applied. After the sheet was pasted and embossed from the surface, an amino alkyd resin of 559/M2 was applied and dried.

The obtained laminated decorative board had a uniform hue, excellent gloss, and a natural appearance with an uneven pattern.

[Brief explanation of drawings]

The drawing is a sectional view showing an example of a laminate decorative board obtained by the present invention. 1...Base material, 2...Adhesive material, 3...
... Hiding filler, 4... Glossy powder, 6.
...Translucent sheet.

Claims (1)

[Claims] 1. A masking filler with a specific gravity of 3.5 or more and a filler with a specific gravity of 3.
A method for producing a laminated decorative board, which comprises applying an adhesive mixed with the following glossy powder and a dispersant to the upper surface of a base material, and laminating a translucent sheet on the surface. 2. The method for manufacturing a laminated decorative board according to claim 1, wherein the glossy powder is composed of mica powder.